Underground in Kyoto, the National Nantianmen Project is dormant like a giant dragon. Rong Zishuming is a business elite and the chief expert on the country's most important weapon. He built the Great Wall of Space with his own flesh and blood. Her husband Ren Huaiding led the Canglang Special Forces and hid in the darkness with 4,800 iron-blooded soldiers to guard the Chinese sky.
Twenty-two-year-old Qin Junxi has had the image of the aunt next door engraved in his bones since he was a boy. The sun hits the iceberg, and the blazing love breaks through the disguise of identity - until the bullets of the "Black Sun" organization pierce the long night.
He used his body as a shield, and her clothes were dyed red with blood.
At that moment, Qin Yutong's dusty identity resurfaced...
After the smoke cleared, Rong Zishu looked at the young man who was protecting her with his life, and suddenly understood: his intention to protect her, and her mission to protect the country, turned out to be equally hot...
On the underground Great Wall, Ren Huaiding and Meng Shiqi stood side by side, and their master-disciple relationship deepened and they became a life-or-death promise.
The greatness of the country is like the dawn of lovers guarding each other under thousands of miles of stars.
Country and family, iron and blood, love and defense - on this underground fortress that operates day and night, a symphony about loyalty and love is playing the most magnificent movement.
